220 10509 article Path: news.gmane.org!not-for-mail From: 0xc0deface@gmail.com Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: get_deleter_type_info Date: Mon, 5 May 2014 18:20:31 -0700 (PDT) Lines: 112 Approved: news@gmane.org Message-ID: References: <2219117.8dN8m88Reg@tjmaciei-mobl4> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_1416_25064235.1399339231494" X-Trace: ger.gmane.org 1399401086 4552 80.91.229.3 (6 May 2014 18:31:26 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 6 May 2014 18:31:26 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBDB7RZECV4IRBYHRUCNQKGQED3PJRMA@isocpp.org Tue May 06 20:31:19 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-ig0-f198.google.com ([209.85.213.198]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1WhjEF-0002Ao-So for gclcip-std-proposals@m.gmane.org; Tue, 06 May 2014 19:32:32 +0200 Original-Received: by mail-ig0-f198.google.com with SMTP id uq10sf12220615igb.1 for ; Tue, 06 May 2014 10:32:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=date:from:to:message-id:in-reply-to:references:subject:mime-version :x-original-sender:reply-to:precedence:mailing-list:list-id :list-post:list-help:list-archive:list-subscribe:list-unsubscribe :content-type; bh=Sr6D0xJ3GEoC0vhYBkm3P2rSRTJHl+QjqGmxpy4Qh6c=; b=ilKQCl0FNCBWg8KkG/CDFyJPqsEuIXr1lkimAnwTrvFTNC+mZyhn9p3faOo0rh1rwM OO9u0v1qHzhpTx8n/brLrh5CNgVrmrqZPiA9Oxl8xTj+DPHC2Mhuyiw1YC954hFPGgof hDaOzMipJutcVZqszC9wBaRAC02hLssI5H9E76QKiTmDhu41bwj4iOvC/b0Q/9CSZpp3 IXnTrvI5Zrhy7dViOau2QbGFieINdL7FdzbjPP/OcBt3kBpKgjY3zzH/4Ck4s8vVdTu/ Ug8ppc1M7y0e/Q4IOAOoc60FqyW4khybjgvpI2a0Y12ny5EKNdopM31kET7ybotcCAer 6zeg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:date:from:to:message-id:in-reply-to:references :subject:mime-version:x-original-sender:reply-to:precedence :mailing-list:list-id:list-post:list-help:list-archive :list-subscribe:list-unsubscribe:content-type; bh=Sr6D0xJ3GEoC0vhYBkm3P2rSRTJHl+QjqGmxpy4Qh6c=; b=eyXvZKRk/ePb8Eu3Kvr4um3zDV6rPsROf0Xn0bxzaVfqVrOa5PE+qVOqDIn3n0fsSB ZZ54tFO7JzxzRwXI5LzzN2CnvWoqsYA6YC9/0J2nJKpKjNbQbABIoSicnhJAA5/On2PO /NpQSWSaeop/fS6Bc6JsZkp2jUxwFxCtOqYyBoTmhIG9Yyh+JSY+WSCPBimPWxVOizH1 EXlmi3rnObUINxkOLm2Kn4DRo44cL17CbhKafRHxtuSGEvGbgWB8JOf726bQMabM26NX 7SqjfLdC2y14YFtRSzwKMBjeQoU5O9jsUI0SYZFjb0d9K7Hal3elPf+MQTL/mJ710rFF hI0w== X-Gm-Message-State: ALoCoQk8+4LxxfLVi0ajdOSybS4WglggG0zz/gvm1/uPYGhx654I7eIcJ202B/XvDvbZeiZCgkKe X-Received: by 10.182.105.1 with SMTP id gi1mr18934469obb.6.1399339233144; Mon, 05 May 2014 18:20:33 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.182.88.131 with SMTP id bg3ls1014593obb.93.gmail; Mon, 05 May 2014 18:20:32 -0700 (PDT) X-Received: by 10.182.236.1 with SMTP id uq1mr31837obc.10.1399339232136; Mon, 05 May 2014 18:20:32 -0700 (PDT) In-Reply-To: X-Original-Sender: 0xc0deface@gmail.com Precedence: list Mailing-list: list std-proposals@isocpp.org; contact std-proposals+owners@isocpp.org List-ID: X-Google-Group-Id: 399137483710 List-Post: , List-Help: , List-Archive: List-Subscribe: , List-Unsubscribe: , Xref: news.gmane.org gmane.comp.lang.c++.isocpp.proposals:10509 Archived-At: ------=_Part_1416_25064235.1399339231494 Content-Type: text/plain; charset=UTF-8 On Tuesday, 6 May 2014 01:06:53 UTC+10, Nevin ":-)" Liber wrote: > > On 5 May 2014 02:37, Matthew Fletcher <0xc0d...@gmail.com >wrote: > >> The use case where I am having problems is with serialisation of >> shared_ptr. >> > > Just serializing the deleter isn't sufficient; for correctness you also > need to serialize the allocation method (both the object and the deleter > may be dependent upon it), which isn't directly stored with the shared_ptr. > True. I hadn't considered the allocator as im currently not using one. > > Having the type_info object would allow quicker lookups so that the type >> can be serialised sooner, and would avoid a O(n) search. >> > > You have that many deleters where this will make a difference?? > No. At the moment we only have a handful of custom deleters. However who knows how the design may change in the future. > -- > Nevin ":-)" Liber > (847) > 691-1404 > -- --- You received this message because you are subscribed to the Google Groups "ISO C++ Standard - Future Proposals" group. To unsubscribe from this group and stop receiving emails from it, send an email to std-proposals+unsubscribe@isocpp.org. To post to this group, send email to std-proposals@isocpp.org. Visit this group at http://groups.google.com/a/isocpp.org/group/std-proposals/. ------=_Part_1416_25064235.1399339231494 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable


On Tuesday, 6 May 2014 01:06:53 UTC+10, Nevin ":-)= " Liber wrote:
On 5 May 2014 02:37, Matthew Fletcher <0xc0d...@gmail.com> wrote:
The use case where I a= m having problems is with serialisation of shared_ptr.

Just serializing the deleter isn't sufficient; for corr= ectness you also need to serialize the allocation method (both the object a= nd the deleter may be dependent upon it), which isn't directly stored with = the shared_ptr.

Tru= e. I hadn't considered the allocator as im currently not using one. 

 

Having the type_info object would allow quicker lo= okups so that the type can be serialised sooner, and would avoid a O(n) sea= rch.

You have that many delet= ers where this will make a difference??

No. At the moment we only have a handful of custom del= eters. However who knows how the design may change in the future.
 
--
 Nevin ":-)" Liber  <mailto:ne...@eviloverlord.com>  (847) 691-140= 4

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